Title :
Comparative study of resonant and non-resonant DC-DC converter with parasitic LC components of high-voltage transformer
Author :
Takano, H. ; Takahashi, J. ; Sun, J.M. ; Nakaoka, M.
Author_Institution :
Res. & Dev. Center, Hitachi Med. Corp., Chiba, Japan
Abstract :
This paper presents a novel nonresonant PWM DC-DC power converter for an X-ray high-voltage power generator using the parasitic impedances of the high-voltage high-frequency link transformer compared to the conventional series-parallel resonant DC-DC power converter. The key point of this approach is to evaluate the effectiveness of a reduction of the turn ratio of the high-voltage high-frequency transformer on improvements in the total power conversion efficiency and the power factor in applying a boost AC-DC power converter as the DC voltage source, especially in the light output load ranges accompanied with long exposure term.
Keywords :
DC-DC power convertors; PWM power convertors; X-ray production; high-frequency transformers; power supplies to apparatus; power transformers; DC voltage source; X-ray high-voltage power generator; boost AC-DC power converter; high-voltage high-frequency link transformer; light output load range; nonresonant PWM DC-DC power converter; parasitic impedance; power conversion efficiency; power factor; turn ratio reduction; Capacitance; DC-DC power converters; Impedance; Power conversion; Power generation; Power transformer insulation; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Resonance;
Conference_Titel :
Industry Applications Conference, 1998. Thirty-Third IAS Annual Meeting. The 1998 IEEE
Conference_Location :
St. Louis, MO, USA
Print_ISBN :
0-7803-4943-1
DOI :
10.1109/IAS.1998.730351
